1. Nb and Ni Nanoparticles Anchored on N-Doped Carbon Nanofiber Membrane as Self-Supporting Anode for High-Rate Lithium-Ion Batteries.
- Author
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Zhang, Yezheng, Zhang, Shan, Zhao, Shuo, Cui, Yingxue, Lian, Jiabiao, and Li, Guochun
- Subjects
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LITHIUM-ion batteries , *DOPING agents (Chemistry) , *ANODES , *NANOPARTICLES , *WRINKLE patterns - Abstract
A flexible N-doped carbon nanofiber membrane loaded with Nb and Ni nanoparticles (Nb/Ni@NC) was prepared using electrospinning technology and a subsequent thermal annealing method and used as a self-supporting anode material for lithium-ion batteries. The Nb/Ni@NC nanofiber membrane had excellent flexibility and could be folded and bent at will without fragmentation and wrinkling; the nanofibers also had a uniform and controllable morphology with a diameter of 300–400 nm. The electrochemical results showed that the flexible Nb/Ni@NC electrode could deliver a high discharge capacity of 378.7 mAh g−1 after 200 cycles at 0.2 A g−1 and an initial coulombic efficiency of 67.7%, which was higher than that of the pure flexible NC anode in contrast. Moreover, a reversible discharge capacity of 203.6 mAh g−1 after 480 cycles at 1.0 A g−1 was achieved by the flexible Nb/Ni@NC electrode with a capacity decay for each cycle of only 0.075%, which showed an excellent rate capability and cycling stability. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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